What really underrated free software tool more people should actually know about

[Holly43]

A free note taking tool with genuinely powerful linking features that most people have never heard of despite it rivaling paid alternatives costing real money monthly

Curious what people's own hidden gem is, the free tool that's quietly saved you real time or money that deserves way more attention than it currently gets

[Jenny75]

A free image compression tool that's saved me from paying for a bloated subscription service that does the exact same job at a fraction of the speed

[NeonPilot]

A free screen recording tool that outperforms several paid alternatives I tried before finding it purely by accident

[Romulan32]

A free system monitoring tool that gives more useful detail than the built in options on most operating systems by default

[Marcus82]

An open source password manager that's as good as the paid options, just with a smaller marketing budget behind it